CN200965551Y - Multi-functional digital watt-hour meter - Google Patents
Multi-functional digital watt-hour meter Download PDFInfo
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- CN200965551Y CN200965551Y CN 200620139789 CN200620139789U CN200965551Y CN 200965551 Y CN200965551 Y CN 200965551Y CN 200620139789 CN200620139789 CN 200620139789 CN 200620139789 U CN200620139789 U CN 200620139789U CN 200965551 Y CN200965551 Y CN 200965551Y
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- CN
- China
- Prior art keywords
- circuit
- data processing
- sampling circuit
- voltage
- electric energy
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- Expired - Fee Related
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Abstract
The utility model relates to a multifunctional digital type electric energy meter, which comprises a shell comprising an upper cover and a lower cover as well as a plug and a conductor arranged on the shell; wherein, an electronic controller in the shell comprises a voltage stabilizing circuit for power supply commutating, a voltage sampling circuit, a current sampling circuit, a data processing peripheral circuit, an LCD, a key press and an SCM; wherein, the voltage sampling circuit and the current sampling circuit are respectively connected with the data processing peripheral circuit; the data processing peripheral circuit, the key press and the LCD are respectively connected with the SCM; and the voltage stabilizing circuit for power supply commutating is respectively connected with each circuit and the SCM. The utility model has the advantages of simple circuitry, low cost, displaying of the existing magnitude of voltage, value of current, power value, power factor, accumulative electric power consumption, hours of use, total electric charge and overloading display with figures in the SCM, complete function and convenient use.
Description
Technical field
The utility model relates to the multifunction digital electric energy meter, and specifically a kind of numeral of using shows current voltage, electric current, power, power factor, and shows the liquid crystal display electric energy meter of functions such as accumulative total power consumption, the electricity charge, belongs to electric energy meter manufacturing field.
Background technology
Existing electric energy metrical mode, normally used have several electric energy meters such as induction type, electronic type, multi-functional full electronic.Induction type electric energy meter, electronic electric energy meter generally only have merit electric energy metrical and reactive energy function of measuring, multi-functional full-electronic electric energy meter removes has induction type electric energy meter, outside the function of electronic electric energy meter, also have many rate meterings, functions such as electrical network parameter measurement, electric weight statistics, but peripheral circuit complexity, the chip of this full-electronic multifunctional electric energy meter are many are so not only electric energy meter manufacturing cost height, energy consumption are big, and the fault height, poor reliability.The disclosed patent No. of Chinese patent is " 200320110889.6 ", " multi-functional single-phase electronic electric energy meter ", and it also has the stealing of preventing except that general electric energy meter function, earth leakage protection, auto-power-cutting function.But the function of this electric energy meter is also enough complete, and complex circuit, and manufacturing cost is higher.
Summary of the invention
The purpose of this utility model is at the defective of above-mentioned prior art and deficiency, is provided for showing and writing down the liquid crystal display electric energy meter of electrical parameter for power industry.
The technical measures taked of the utility model are for achieving the above object: this multifunction digital electric energy meter, it comprises the housing of being made up of loam cake and lower cover, place plug and conductor inserting column on the housing, electronic controller in the housing is by power supply rectifier and voltage regulator circuit, voltage sampling circuit, current sampling circuit, the data processing peripheral circuit, LCD, button and single-chip microcomputer are formed, voltage sampling circuit, current sampling circuit connects the data processing peripheral circuit respectively, the data processing peripheral circuit, LCD, button connects single-chip microcomputer respectively, and power supply rectifier and voltage regulator circuit joins with above-mentioned each circuit and single-chip microcomputer respectively.
Described single-chip microcomputer connects the 3V battery in addition;
Described power supply rectifier and voltage regulator circuit is by inductance L
1, L
2, resistance R
1, R
6, R
7, R
8, R
9, R
10, R
11, R
12, R
13, diode D
1, D
2, D
3, D
4, D
5, capacitor C
1, C
2, C
3, C
6, C
7, C
8, C
9, triode T
1, T
2, T
3And stabilivolt U
1Form, wherein inductance L
1, resistance R
1Join inductance L with voltage sampling circuit
2Join with current sampling circuit;
Described voltage sampling circuit is by resistance R
2, R
3, R
4Capacitor C
4And adjustable potentiometer W
1Form, wherein W
1Moving contact and data processing peripheral circuit join;
Described current sampling circuit is by resistance R
5, capacitor C
5And adjustable potentiometer W
2Form, wherein W
2Moving contact data processing peripheral circuit joins;
Described data processing peripheral circuit is by resistance R
21, R
22, R
23, R
24, R
25, R
26, R
27, R
28, R
31, R
32, R
33, R
34, R
35, R
36, R
37, R
38, R
41, R
42, R
43, R
44, R
45, R
46And operational amplifier U
2A, U
2B, U
2C, U
2D, U
3A, U
3B, U
4, capacitor C
3, C
4And VMOS pipe T
1Form, wherein U
2C, U
2B, U
3A, U
3B joins with single-chip microcomputer 7 respectively.
The utility model is simple in structure, and volume is small and exquisite.When inserting the consumption load, can show current voltage, electric current, power, power factor, and can show digital Presentation Functions such as accumulative total power consumption, the electricity charge, for power industry provides a kind of new electric energy meter.
Description of drawings
Fig. 1 is a stereographic map of the present utility model.
Fig. 2 is the electric functional-block diagram in the utility model electronic controller.
Fig. 3 is the utility model electronic controller electrical schematic diagram of (not comprising power rectifier voltage stabilizing, voltage sample, current sampling circuit).
Fig. 4 is power rectifier voltage stabilizing, voltage sample, the current sampling circuit in the utility model electronic controller.
Fig. 5 is the data processing peripheral circuit in the utility model electronic controller.
Fig. 6 is single-chip microcomputer and the liquid crystal display circuit in the utility model electronic controller.
Fig. 7 is the LCDs synoptic diagram that covers on the utility model.
Embodiment
Fig. 1 is the three-dimensional exploded view of the utility model structure, and this multifunctional digital electric energy meter comprises the housing be made up of loam cake 9 and lower cover 10, places plug 11 and conductor inserting column 12 on the housing.Housing is built-in with the wiring board of electronic controller.
Fig. 2 is the electric functional-block diagram of the utility model electronic controller.This electronic controller is made up of power supply rectifier and voltage regulator circuit 4, voltage sampling circuit 1, current sampling circuit 2, data processing peripheral circuit 3 and single-chip microcomputer 7, LCD 5 and button 6.Voltage sampling circuit 1 and current sampling circuit 2 connect data processing peripheral circuit 3 respectively, data processing peripheral circuit 3 connects the 5th, 6,7,8,15,19,20,22 pin of single-chip microcomputer, button 6 connects the 79th, 81,83,85 pin of single-chip microcomputer, the 29th, 30,31,32,41 to 72 pin of single-chip microcomputer connect LCD 5, and power supply rectifier and voltage regulator circuit 4 joins with above-mentioned each circuit and single-chip microcomputer 7 respectively.The 23rd pin of described single-chip microcomputer 7 connects 3V battery 8.Used single-chip microcomputer 7 is that model is the HT46R65 chip.
By Fig. 3, shown in Figure 4, power supply rectifier and voltage regulator circuit is by inductance L
1, L
2, resistance R
1, R
6, R
7, R
8, R
9, R
10, R
11, R
12, R
13, diode D
1, D
2, D
3, D
4, D
5, capacitor C
1, C
2, C
3, C
6, C
7, C
8, C
9, triode T
1, T
2, T
3And stabilivolt U
1Form.Inductance L wherein
1, resistance R
1With the resistance R in the voltage sampling circuit 1
2Join inductance L
2With the resistance R in the current sampling circuit 2
5Join.By 220V voltage process anti-interference filtration inductance L
1, L
2Enter, through R
1, C
1(R wherein behind the resistance-capacitance depressurization
8, R
9Be discharge resistance), by commutation diode D
2Half-wave rectification is through capacitor C
2, filtered diode D
3Produce+8 volts of voltages after the voltage stabilizing, simultaneously by diode D
1Half-wave rectification is through capacitor C
3Filtering, diode D
4Voltage stabilizing produces-8 volts of voltages.+ 8 volts of voltages are again via triode T
1, stabilivolt U
1, capacitor C
6, resistance R
6And R
7, R
12The single-chip microcomputer operating voltage of the mu balanced circuit generation+5V that forms.Triode T
2, T
3, diode D
5And resistance R
10, R
11, R
13Formed an on-off circuit, when operating voltage 220V, triode T2, T3 conducting ,+5V voltage directly is added to the 75th, 76 pin of single-chip microcomputer 7 by connector P1.In case power down, triode T2, T3 close, and the 3V battery is by diode D
5Can directly be added on the single-chip microcomputer.
By Fig. 3, shown in Figure 5, data processing peripheral circuit 3 is by resistance R
21, R
22, R
23, R
24, R
25, R
26, R
27, R
28, R
31, R
32, R
33, R
34, R
35, R
36, R
37, R
38, R
41, R
42, R
43, R
44, R
45, R
46And operational amplifier U
2A, U
2B, U
2C, U
2D, U
3A, U
3B, U
4And capacitor C
3, C
4And VMOS pipe T
1Form, wherein U
2C, U
2B, U
3A U
3B, join with the 5th, 6,7,8,19,20,22 pin of single-chip microcomputer 7.
From the voltage signal Ub of 1.7～2.7VAC of voltage sampling circuit, resistance R in figure
21, capacitor C
3Filtering, by operational amplifier U
2D and U
2Forward precision rectifying that C constitutes and reverse precision rectifying are merged into a voltage U C signal, and the 5th, 6 pin of input single-chip microcomputer are simultaneously by operational amplifier U
3B and resistance R
27, R
28Form a zero cross signal testing circuit, produce a sampling and judge signal, be connected to the 19th, 22 pin of single-chip microcomputer.
Low current signal I from current sampling circuit
bVia resistance R among Fig. 4
31, capacitor C
4After the filtering, enter operational amplifier U
4Amplify, when single-chip microcomputer detected electric current less than 0.45A, single-chip microcomputer the 15th pin was output as high level and makes conducting under the VMOS pipe T1.This moment is by R
41, R
42, R
43, R
44, R
45, R
46Constitute 1024 times enlargement factor, when single-chip microcomputer detected electric current greater than 0.45A, single-chip microcomputer the 15th pin output low level made not conducting of VMOS pipe T1, and this moment is by R
41, R
42, R
43, R
44, R
45Constitute 32 times of enlargement factors, the signal after the amplification enters by operational amplifier U
2A and U
2The interchange precise rectification circuit that B forms, the output forward is the 100Hz pulsating current, and through single-chip microcomputer the 6th, 7 pin, is convenient to the single-chip microcomputer sampling.Simultaneously, by operational amplifier U
3A and resistance R
37, R
38Form a zero cross signal testing circuit, produce a sampling and judge signal, be connected to single-chip microcomputer 7 the 25th pin.
Fig. 5, shown in Figure 7, LCD can show current magnitude of voltage, current value, performance number, power factor, accumulative total power consumption, service time, total electricity charge and overload demonstration etc.
By shown in Figure 6, button is by S
1, S
2, S
3, S
4Often opening touch-switch forms the adjustment key, key, function key, reset key, wherein S is set
4Be reset key.X
1, X
2Be crystal oscillator, X
1Generation time shows reference frequency, X
2Be single-chip microcomputer working standard frequency.
UP: button is adjusted key, and is after entering the state of setting, short in adjusting numerical value; There are being clock demonstration and the non-state that is provided with to switch as 12,24 hours;
SET: key is set, short in entering the state of setting;
FUN: function key, short in showing each parameter, long by entering the parameter setting;
RESET: reset key, remove all parameter currents.
Claims (6)
1, a kind of multifunction digital electric energy meter, it comprises the housing of being made up of loam cake (9) and lower cover (10), place plug (11) and conductor inserting column (12) on the housing, it is characterized in that the electronic controller in the housing is by power supply rectifier and voltage regulator circuit (4), voltage sampling circuit (1), current sampling circuit (2), data processing peripheral circuit (3), LCD (5), button (6), and single-chip microcomputer (7) is formed, voltage sampling circuit, current sampling circuit connects the data processing peripheral circuit respectively, the data processing peripheral circuit, LCD (5), button (6) connects single-chip microcomputer (7) respectively, and power supply rectifier and voltage regulator circuit joins with above-mentioned each circuit and single-chip microcomputer respectively.
2, multifunction digital electric energy meter according to claim 1 is characterized in that described single-chip microcomputer connects the 3V battery in addition.
3, multifunction digital electric energy meter according to claim 1 and 2 is characterized in that power supply rectifier and voltage regulator circuit (4) is by by inductance L
1, L
2, resistance R
1, R
6, R
7, R
8, R
9, R
10, R
11, R
12, R
13, diode D
1, D
2, D
3, D
4, D
5, capacitor C
1, C
2, C
3, C
6, C
7, C
8, C
9, triode T
1, T
2, T
3And stabilivolt U
1Form, wherein inductance L 1, resistance R 1 are joined with voltage sampling circuit (1), and inductance L 2 is joined with current sampling circuit (2).
4, multifunction digital electric energy meter according to claim 1 and 2 is characterized in that described voltage sampling circuit (1) is by resistance R
2, R
3, R
4, capacitor C
4And adjustable potentiometer W
1Form, wherein potentiometer W
1Moving contact and data processing peripheral circuit (3) join.
5, multifunction digital electric energy meter according to claim 1 and 2 is characterized in that described current sampling circuit (2) is by resistance R
5, capacitor C
5And adjustable potentiometer W
2Form, wherein potentiometer W
2Moving contact and data processing peripheral circuit (3) join.
6, multifunction digital electric energy meter according to claim 1 and 2 is characterized in that described data processing peripheral circuit (3) is by resistance R
21, R
22, R
23, R
24, R
25, R
26, R
27, R
28, R
31, R
32, R
33, R
34, R
35, R
36, R
37, R
38, R
41, R
42, R
43, R
44, R
45, R
46And operational amplifier U
2A, U
2B, U
2C, U
2D, U
3A, U
3B, U
4, capacitor C
3, C
4And VMOS pipe T
1Form, wherein U
2C, U
2B, U
3A, U
3B joins with single-chip microcomputer (7) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620139789 CN200965551Y (en) | 2006-11-08 | 2006-11-08 | Multi-functional digital watt-hour meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620139789 CN200965551Y (en) | 2006-11-08 | 2006-11-08 | Multi-functional digital watt-hour meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200965551Y true CN200965551Y (en) | 2007-10-24 |
Family
ID=38869568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620139789 Expired - Fee Related CN200965551Y (en) | 2006-11-08 | 2006-11-08 | Multi-functional digital watt-hour meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200965551Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620240B (en) * | 2009-03-10 | 2013-03-27 | 吴嘉懿 | Anti-electricity-theft electric energy meter |
| CN104808053A (en) * | 2015-05-18 | 2015-07-29 | 张新安 | Electronic watt hour meter |
| CN106124815A (en) * | 2016-08-19 | 2016-11-16 | 重庆华虹仪表有限公司 | Mechanical power energy meter voltage display circuit |
-
2006
- 2006-11-08 CN CN 200620139789 patent/CN200965551Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101620240B (en) * | 2009-03-10 | 2013-03-27 | 吴嘉懿 | Anti-electricity-theft electric energy meter |
| CN104808053A (en) * | 2015-05-18 | 2015-07-29 | 张新安 | Electronic watt hour meter |
| CN106124815A (en) * | 2016-08-19 | 2016-11-16 | 重庆华虹仪表有限公司 | Mechanical power energy meter voltage display circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071024 Termination date: 20141108 |
|
| EXPY | Termination of patent right or utility model |